LM2991QML中文资料负低压降可调节稳压器数据手册TI规格书

描述 Description

The LM2991 is a low dropout adjustable negative regulator with a output voltage range between −2V to −25V. The LM2991 provides up to 1A of load current and features a ^On /Off pin for remote shutdown capability.

The LM2991 uses new circuit design techniques to provide a low dropout voltage, low quiescent current and low temperature coefficient precision reference. The dropout voltage at 1A load current is typically 0.6V and a guaranteed worst-case maximum of 1V over the entire operating temperature range. The quiescent current is typically 1 mA with a 1A load current and an input-output voltage differential greater than 3V. A unique circuit design of the internal bias supply limits the quiescent current to only 9 mA (typical) when the regulator is in the dropout mode (VO − VI ≤ 3V).

The LM2991 is short-circuit proof, and thermal shutdown includes hysteresis to enhance the reliability of the device when inadvertently overloaded for extended periods.

特性 Features

• Output voltage adjustable from −2V to −25V
• Output current in excess of 1A
• Dropout voltage typically 0.6V at 1A load
• Low quiescent current
• Internal short circuit current limit
• Internal thermal shutdown with hysteresis
• TTL, CMOS compatible ^ON/OFF switch
• Functional complement to the LM2941 series